Oven for baking and industrial purposes



C. W. AIRD.

OVEN FOR BAKING AND INDUSTRIAL PURPOSES.

APPLICATION FILED APR. 14. l9l9.

1,320,821. v Patented Nov. 4,1919.

2 SHEETSSHEET 1.

aQ/L

C. W. AIRD. OVENFOR BAKlNG AND INDUSTRIAL PURPOSES.

APPLICATION mm APR. 14.1919.

1,320,821 Patented Nov. 4, 1919.

2 SHEETS-SHEET 2- ITED STATES CLARENCE WILLIAM AIRD, OF BRANTFORD,ONTARIO, CANADA.

OVEN FOR BAKING- AND INDUSTRIAL PURPOSES.

Application filed April 14, 1919.

To all whom it may concern:

Be it known that I, CLARENCE W. A m), of the city of Brantford, in thecounty of Brant .and Province of Ontario, Dominion of Canwalls, whichconsist of peculiarly construct-" ed sections or panels, insulatedagainst heat loss and maintained in their assembled relation byinterlocking, self-sealing joints; the objects of the invention being(a) to provide for expansion strains, resulting from relatively high.temperatures and pressures within the oven during its use;

(b) to eliminate heat loss, by preventing leakage, convection, andconduction.

(0) to simplify the construction, assembly, traisportation, and erectionof the walls; an

(cl) to provide a mechanically strong structure without detracting fromits insu: lating properties;

These objects being attained by the construction hereinafter set forthand partied larly pointed out in the claims.

For an understanding of the invention, reference is to be had to thefollowing description, and to the accompanying drawings in which;

Figure 1, is a fragmentary view of an oven, constructed of sections orpanels.

Fig. 2, is a perspectiveview of one of the sections or panels, shown inFig. 1.

Fig. 3, is a perspective view of part of the casing of the section orpanel shown in Fig. 2.

Fig. 4C, is a perspective view of the channel shown in Fig. 2.

Fig. 5, is a perspective view of the remainder of the casing of thesection or panel shown in Fig. 2.

Fig. 6, is a longitudinal section on the line a a, Fig. 2.

Fig. 7. is a cross sectional view on the line bb, Fig. 2, and e Fig. 8,is a horizontal section through the corner of the oven, shown in Fig. 1.

' Like characters of reference refer to like parts throughout thespecification and draw- 1ngs.

. Fig. 1 shows a side wall, consisting of four sections or panels a, anda portion of the Specification of Letters Patent.

Patented Nov. 4, 1919.

Serial No. 289,941.

front wall, comprising a section or panel 6,

these being sufficient to explain the construction, assembly anderection of the walls of an oven, such for instance of the type shown inLetters Patent No. 626,773, dated June 13, 1899.

Each of the panels shown in Fig. 1, extends the full height of the oven,and is composed of a hollow casing filled with heat insulating material0, and preferably constructed as hereinafter described.

Along one of the vertical edges (Z, of the section or panel, is achannel of relatively considerable depth, and of an interior width,corresponding to the thickness of the other vertical edge d, of the samesection or panel.

F 'or convenience of assembly the sections or panels are standardized,so far as height and thickness are concerned, and being of correspondingdimensions, in this respect,

the channel of one section or panel will receive and tightly embrace theopposite edge cl of the next adjacent section or panel, so that duringthe erection of the walls, the edge d of each section or panel may bepressed into the channeled edge cl, of the next adjacent section orpanel, until all of the sections or panels of the wall have beenassembled;'but the width of the panels may vary as that dimension willdepend to a large extent on the length of the oven.

The parallel sides cl, d of the channels, are preferably flexible and ofsuch mechanical strength as to exert suflicient pressure on the sectionsor panels, to not only maintain the assembly without the use of rivets,bolts or other fastening devices, but also form a substantially gas orair tight joint, and thereby prevent heat leakage from the interior ofthe oven. The sections or panels have, by this means of assembly, alimited freedom of movement when expanding and contracting during thevariations of tem' perature and pressure within the oven, which relievesthe walls of the strains otherwise resulting therefrom.

A simple method of constructing each section or panel is to 'make thechannel of from sheet metal, of suitable dimensions, and cut and bend itto form the channel bottom or side d, spaced sides (Z. (Z and endflanges d, the flanges d being bent at appropriate angles to the bottomor side (Z to pro ect beyond it in a direction opposite to the spacedsides d, 6Z3.

\j The casing of the section or panel consists ti'vely wide side 0, a.narro wise e-f the side 6 and at right angles thereto,

of two part s; which may for convenience,

be termed the and the cover? 5 The pan, as showriif Pg. 3, 1s made ilromsheet metal cut and sh .s

to form a rel aiv side a lengthand two transverse sides 0, 6 at theextremit'ies or the side e. In cutting" the bl airl; from which the P ismade, ,su ilicient metal is" irovided in the of .thesi'do e to permit ofextremities being bent lemma; form! we flanges f, f, which abut againstthe" sides 6, c to which they are secured preferably are: ets f, andsuflicient metal is al s'6phi;\rided along the .free edge ofthe side 6team; a fold 9,, for the purpose hereinafter de states;- I As shown iii;Fig.- 5, the side 0 is extended beyond the sides 5, c and is formed witha fold When; the pan and the channel are assembled, the side d of thechannel is contained in the fold g" and the botto'i'n side at of thechannel and the sides 6', e,- c, 6 then constitute five sides ottl-i'ecasing In assembling the above described parts, the side 6 of thechannel is insertedin the fold g, which is pressed to tightly ace it andhold it securely in its assembled rela-- tion without theuse of otherfastening means and the flanges dT, are positioned to abut against theinner surface of the sides 0', 6 to which they are secured, preferablyby rivets, as shownat g.

The channel bottom or side (Z and the sides 6, e, a are all of the sameheight, so that the cover it will lie evenly thereon.

To provide a simple'means of securing the cover to the pan and channel,the sides a", 6 areprowd d with outturnedflanges '71, i, at right anglesto the sides 6'', e respectively, and the cover it is formed with foldsh, 7;, ha, h, along its four edges, into which enter the side cl of thechannel, the fold g along the top of the sidee and the flanges i, i, atthe top of the sides e, 6 When the cover and the pan are assembled, thefolds h, h, If, 75*, are tightly pressed against a the parts containedwithin them,

and the cover 1s then firmly secured to the pan without the use ofbolts, rivets, or the like.

To prevent heat loss by convection or conduction, sheets of insulatingmaterial, j, j are interposed between the flanges 71, i respectively,and the cover, this insulation overlapping the edges of the sides 6', esuflicient for that purpose.

WVhen the cover is provided with a base, the flange i is out-turned asshown in Fig. 3, but when the base is not used the flange may beinturned or omitted.

For the corner or angle section or panel, the channel side d" and fold gare omitted and the channel side d is bent around the is providedbrackets is,

adjacent edge of tile panel 5, as -a in Fig 8.

In this case the corner giane jl or sea 510R a with an angle nan, on"Angle riveted to the sect'ibn, anrll ,b Z are passed through the bentads: at; t section or panel 6, and angle iron en'bnare ets 7: to securethe corner panels or sectimw to 'ether.

he top of the oven may consist of pairelss f sections similar toth oseof the side walls,. and 191W he supported on the top of the sidev panels6 1% seet'ions where they are held against displacement by'the flangesThis construction permlts ofhm1ted GX- pension, andcoiitiiactronlongitudinally, vertical l y and lateraiiya When the sections or panelsare of relatf i ve'l y' coiisi derable wid th, a brace or set of brzdiespit, may be employed; to,mamta1n the spaced relations of the side a andcover h, the brace orbjraces extending paeajerably the full height" efthe section or panes In Fig. 3, the" twee is shown to1l 11 stantially Vshaped, in cross section, w l sheet of insulation mf}. between the-flangm and the side 6, thefbrace'being prei't ably secured in position byrivets or bolts m passing through the fiangea', insulation and saids1de.

Insulating material, 0, either of al ihrous, granular or cellularcharacter may be enaployed within the section or panel to 'pre vent heatloss. 7

While I have described in detail one specie we fic means of carrying theinvention into practice, I wish it to be imderstood that va-- riouschanges in the structural details maytjbej made within the, scope of pthe appended claims, without departing from'the princi 105 ple of theinvention.

Having thus-f lly described my invention, what Iclaim'as new and desireto se- 2. An oven for baking and industrial purposes comprising a wallcomposed of a set of sections or panels each of which has a channel ofU-sha'pe along one edge, formed with flexible parallel sides, adapted toreceive between them the opposite edge of the next adjacent section orpanel and, form with it an interlocking self-sealing joint whichmaintains the assembly of the sections or panels without the use offastening means and provides for the expansion strains resulting fromchanges of temperature and and industrial 311x0 pressure within theoven, said channel being of a unitary structure with the body of thesection or panel.

3. An oven for baking and industrial purposes comprising a wall composedof a set of sections or panels, each of which has a channel of U-shapealong one edge, adapted to receive the opposite edge of the nextadjacent section or panehand form with it an interlocking self-sealingjoint and means within the channel for insulating the joint, saidchannel being of a unitary structure with the body of the section orpanel.

4. An oven for baking and industrial purposes, having a wall composed ofsections or panels, each comprising a hollow casing, internally bracedand filled with insulating material, and provided exteriorly along oneedge, with a channel, to receive the opposite edge of the next adjacentsection or panel and form with it an interlocking, self-sealing joint,which maintains the assembly of the sections or panels without the useof fastening means and provides for the expansion strains resulting fromchanges of temperature and pressure within the oven.

5. An oven for baking and industrial purposes, having a wall composed ofsections or panels each comprising a hollow casing consisting of a pan,made from sheet metal cut and shaped to form a relatively wide side, anarrow side, lengthwise of one edge of the relatively wide side and at asuitable angle thereto, a fold along the free edge of the narrow side, afold along the edge of the relatively wide side, opposite to that of thenarrow side, transverse sides at the extremities of the relatively wideside, and of corresponding depth to the narrow side, flanges at the endsof the narrow side abutting against the inner surfaces of the transversesides and riveted thereto, a channel consisting of a side having flangesabutting against the inner surfaces of the transverse sides and rivetedthereto, and two parallel sides to receive between them the oppositeedge of the adjacent section or panel, one of said parallel sides beingcontained within the fold of the relatively wide side, and a coverhaving folded edges to receive therein the other parallel side and thefold of the narrow side, by which the pan and cover are securedtogether.

6. An oven for baking and industrial purposes, having a wall composed ofsections or panels each comprising a hollow casing consisting of a panmade from sheet metal cut and shaped to form a relatively wide side, anarrow side lengthwise of the one edge of the relatively wide side andat a suitable angle thereto, a fold along the free edge of the narrowside, a fold along the edge of the relatively wide side, and ofcorresponding depth to the narrow side, flanges at the ends of thenarrow side abutting against the inner surfaces of the transverse sidesand riveted thereto, a channel consisting of a side having flangesabutting against the inner surfaces of the transverse sides and rivetedthereto, and two parallel sides to receive between them the oppositeedge of the adjacent section or panel, one of said parallel sides beingcontained within the fold of the relatively wide side, and a coverhaving folded edges to receive therein the other parallel side and thefold of the narrow side, flanges for the transverse sides, and foldededges for the cover to receive said flanges.

7. An oven for baking and industrial purposes, having a wall composed ofsections or panels each comprising a hollow casing consisting of a pan,made from sheet metal cut and shaped to form a relatively wide side, anarrow side, lengthwise of one edge of therelatively wide side and at asuitable angle thereto, a fold along the free edge of the narrow side, afold along the edge of the relatively wide side, opposite to that of thenarrow side, transverse sides at the extremities of the relatively wideside, and of corresponding depth to the narrow side, flanges at the endsof the narrow side abutting against the inner surfaces of the transversesides and riveted thereto, a channel consisting of a side having flangesabutting against the inner surfaces of the transverse sides and rivetedthereto, and two parallel sides to receive between them the oppositeedge of the adjacent section or panel, one of said parallel sides beingcontained within the fold of the relatively wide side, and a coverhaving folded edges to receive therein the other parallel side and thefold of the narrow side, and insulation within the casing and betweenthe cover, and said transverse and channel sides.

8. An oven for baking and industrial purposes, having a wall composed ofsections or panels, each comprising a hollow casing consisting of a panmade from sheet metal cut and shaped to form a relatively wide side, anarrow side lengthwise of one edge of the relatively wide side, and at asuitable angle thereto, transverse sides at the extremities of therelatively wide side, and of corresponding depth to the narrow side, achannel side for the pan, a cover secured to the pan and channel side,and insulation within the casing.

9. An oven for baking and industrial purposes comprising a wall composedof a set of sections or panels, each of which has a channel of U-shapealong one edge, adapted to receive the opposite edge of the nextadjacent section or panel, and form with it an interlocking self-sealingjoint, said channel being of a unitary structure with the body of thesection or panel, and means insulating the channel therefrom.

10. An oven for baking and industrial purposes comprising a Wallcomposed of a set of sections or panels each of Which has a channel ofU-shape along one edge, formed With flexible parallel sides, adapted toreceive between them the opposite edge of the next adjacent section orpanel and form with it an interlocking self-sealing joint whichmaintains the assembly of the sec tions or panels Without the use offastening means and provides for the expansion strains resulting fromchanges of temperature and pressure Within the oven, said channel beingof a unitary structure with the body of the section or panel, and meansinsulating the channel therefrom.

11. An oven for baking and industrial purposes comprising a Wallcomposed of a set of sections or panels, each of Which has a channel ofU-shape along one edge, adapted to receive the opposite edge of the nextadjacent section or panel, and form With it an interlocking self-sealingjoint and means Within the channel for insulatingthe joint, said channelbeing of a unitary structure with the body of the section or panel, andmeans insulating the channel therefrom.

Toronto, March 13th, 1919.

CLARENCE WILLIAM AIRD.

Signed in the presence of CHAS. H. RIoHEs,

W. J. Ginorinisr.

Gopiea of this patent may be obtained for five cents each, by addressingthe Commissioner offatents. Washington, D. 0.

